Originally Posted by
DaveReidUK
Thanks for that. It does sound rather counter-intuitive that as soon as AoA drops below the threshold for MCAS commanding AND trim, it then does the opposite.
I note that the extract from the Max System Differences Training Manual (presumably a Boeing publication) on Chris's site makes no mention of MCAS commanding ANU trim:
Yes, several people (including myself) have pointed out that definition leads to an "unstable" outcome when AOA fluctuates close to the 10 degree threshold. Not an elegant algorithm at all...